As a transportation hub with dense personnel and precise equipment, the stable operation of the water supply and drainage system is directly related to the operation safety and efficiency. Among them, the pipeline is the "blood vessel" of the system, and its material selection, design and installation and later maintenance must meet strict standards. HDPE steel mesh skeleton pipes have been widely used in airport water supply and drainage projects due to their excellent comprehensive performance. The following is a specific analysis from the application points.

First, the matching of material properties and engineering requirements

Airport water supply and drainage pipes need to deal with complex environments: on the one hand, the pipeline is under soil pressure, ground load and possible chemical corrosion environment for a long time, and needs to have high pressure resistance and corrosion resistance; on the other hand, the construction space in the airport area is limited, and the pipeline needs to take into account lightness and flexibility, which is easy to transport and install. HDPE steel mesh skeleton pipe is made of high-density polyethylene (HDPE) as the base material, using steel mesh skeleton as the reinforcement layer, and forming the overall structure through the hot-melt connection process. Its ring stiffness can reach SN8 to SN16, which can meet the airport ground vehicle load and soil pressure requirements. At the same time, HDPE material has strong chemical stability, can resist acid, alkali salt and other corrosion, and the pipeline weight is only 1/8 of the steel pipe, which greatly reduces the construction difficulty and cost.

Second, the design specifications and construction standards strictly follow

. The design of airport water supply and drainage engineering needs to be combined with the "Code for Civil Airport Engineering Design" and other industry standards to clarify the requirements for pipeline burial depth, slope and interface treatment. HDPE steel wire mesh skeleton pipe in the design should pay attention to: First, when laying the pipeline, the appropriate foundation form should be selected according to the type of airport foundation, such as soft soil foundation needs to be leveled with sand and gravel cushion to avoid settlement and lead to pipeline deformation; Second, the interface connection needs to strictly implement the hot melt docking process to ensure the strength and sealing of the interface, the construction needs to clean the interface impurities, the heating temperature is controlled at 190-210 ° C, and the pressure is cooled down for not less than 20 minutes to avoid leakage due to improper operation; Third, consider the possible vehicle traffic area on the airport ground, the buried depth should not be less than 0.7 meters, and the concrete protective layer is set above the pipe top to enhance the impact resistance.

3, the key technical points in the construction and installation

airport construction needs to take into account the efficiency and the impact on the operation, HDPE steel mesh skeleton pipe in the installation should pay attention to: First, when excavating the earth, it is necessary to use mechanical and artificial cooperation to avoid over-excavation or disturbance of the base soil, the flatness error of the bottom of the groove needs to be controlled within 50mm; Second, the pipeline hoisting should use special spreader to avoid pipeline distortion or interface stress, the pipe needs to be slow and smooth, to prevent the pipeline and the groove wall collision; Third, the backfill operation needs to be carried out in layers, the thickness of each layer of virtual pavement does not exceed 200mm, and the frog rammer is used to ensure that the compactness reaches more than 95%, to avoid settlement cracking; Fourth, when crossing the airport runway, apron and other key areas, the casing needs to be protected, the casing diameter should be It is more than 200mm larger than the HDPE steel mesh skeleton pipe to prevent ground loads from directly acting on the main pipeline.

Fourth, post-maintenance and long-term performance guarantee

Airport pipeline maintenance should follow the principle of "prevention first, timely repair". Due to the material characteristics of HDPE steel mesh skeleton pipes, later maintenance can focus on: First, regular pipeline CCTV inspections are carried out to check whether the interface is leaking and whether the pipeline is deformed, especially in the rainy season, inspections need to be strengthened to avoid water accumulation affecting airport operations; Second, for the problem of pipeline blockage, high-pressure water jet cleaning technology can be used to remove sediment in the pipe by the impact of water flow to avoid the reduction of pipeline diameter; Third, if the pipeline is found to be partially damaged, it can be partially repaired by electrofusion fittings, which is convenient to operate and does not affect the overall system operation.

In summary, HDPE steel mesh skeleton pipes have significant advantages in airport water supply and drainage projects due to their excellent compression resistance, corrosion resistance and construction convenience. Through rational selection, standardized design, fine construction and scientific maintenance, the long-term stable operation of the airport water supply and drainage system can be effectively guaranteed, providing a solid foundation for the safe and efficient operation of the airport.